Significant New Business	3 Months Ended
Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Significant New Business	SIGNIFICANT NEW BUSINESS 2016 On March 31, 2016, we completed our previously announced transaction with Allianz SE ("Allianz") to reinsure portfolios of Allianz's run-off business. Pursuant to the reinsurance agreement effective January 1, 2016, our subsidiary reinsured 50% of certain portfolios of workers' compensation, construction defect, and asbestos, pollution, and toxic tort business originally held by Fireman's Fund Insurance Company, and assumed net reinsurance reserves of approximately $1.1 billion. Affiliates of Allianz retained approximately $1.1 billion of reinsurance premium as funds withheld collateral for the obligations of our subsidiary under the reinsurance agreement, and we transferred approximately $110.0 million to a reinsurance trust to further support our subsidiary's obligations. Interest on the funds withheld is earned by us based upon an initial fixed interest rate. We have also provided a limited parental guarantee, which is subject to a maximum cap. The combined monetary total of the support offered by us through the trust and parental guarantee is calculated in accordance with contractually defined terms and is capped at $270.0 million. In addition to the reinsurance transaction described above, we have entered into a claims consulting agreement with San Francisco Reinsurance Company, an affiliate of Allianz, with respect to the entire $2.2 billion portfolio, including the 50% share retained by affiliates of Allianz.

SIGNIFICANT NEW BUSINESS

2016

On March 31, 2016, we completed our previously announced transaction with Allianz SE ("Allianz") to reinsure portfolios of Allianz's run-off business. Pursuant to the reinsurance agreement effective January 1, 2016, our subsidiary reinsured 50% of certain portfolios of workers' compensation, construction defect, and asbestos, pollution, and toxic tort business originally held by Fireman's Fund Insurance Company, and assumed net reinsurance reserves of approximately $1.1 billion. Affiliates of Allianz retained approximately $1.1 billion of reinsurance premium as funds withheld collateral for the obligations of our subsidiary under the reinsurance agreement, and we transferred approximately $110.0 million to a reinsurance trust to further support our subsidiary's obligations. Interest on the funds withheld is earned by us based upon an initial fixed interest rate. We have also provided a limited parental guarantee, which is subject to a maximum cap. The combined monetary total of the support offered by us through the trust and parental guarantee is calculated in accordance with contractually defined terms and is capped at $270.0 million.

In addition to the reinsurance transaction described above, we have entered into a claims consulting agreement with San Francisco Reinsurance Company, an affiliate of Allianz, with respect to the entire $2.2 billion portfolio, including the 50% share retained by affiliates of Allianz.